<template>
  <div class="top-category">
    <div class="container">
      <!-- 面包屑 -->
      <XtxBread>
        <XtxBreadItem to="/">首页</XtxBreadItem>
        <!-- 面包屑切换动画 -->
        <transition name="fade-right" mode="out-in">
          <XtxBreadItem v-if="topCategory">{{ topCategory.name }}</XtxBreadItem>
        </transition>
      </XtxBread>
      <!-- 轮播图 -->
      <XtxCarousel :sliders="sliders" style="height:500px" />
      <!-- 所有二级分类 -->
      <div class="sub-list">
        <h3>全部分类</h3>
        <ul v-if="topCategory?.children && topCategory.children.length">
          <li v-for="item in topCategory.children" :key="item.id">
            <a href="javascript:;">
              <img :src="item.picture">
              <p>{{ item.name }}</p>
            </a>
          </li>
        </ul>
      </div>
      <!-- 不同分类商品 -->
      <div class="ref-goods" v-for="item in subList" :key="item.id">
        <div class="head">
          <h3>- {{item.name}}  -</h3>
          <p class="tag">{{item.desc}}</p>
          <XtxMore />
        </div>
        <div class="body">
          <GoodsItem v-for="g in item.goods" :goods="g" :key="g.id" />
        </div>
      </div>
    </div>
  </div>
</template>
<script lang="ts">
export default {
  name: 'TopCategory'
}
</script>
<script setup lang="ts">
import { findTopCategory } from '@/api/category'
import { findBanner } from '@/api/home'
import { childGoodType } from '@/types/resultsType'
import { CategoryListItem } from '@/types/vuexTypes'
import { computed, ref, watch } from 'vue'
import { useRoute } from 'vue-router'
import { useStore } from 'vuex'
import GoodsItem from './components/goodsItem.vue'

// 轮播图
const sliders = ref([])
findBanner().then(({ result }) => {
  sliders.value = result
})
// vuex和route参数
const { state } = useStore()
const route = useRoute()
// 当前顶级分类数据
const topCategory = computed(() => {
  // 从vuex中获取全部分类，从路由参数中获取分类id，然后找到分类名称
  return state.category.list.find((item: CategoryListItem) => item.id === route.params.id)
})

// 推荐商品
const subList = ref<childGoodType[]>([])
const getSubList = () => {
  findTopCategory(route.params.id as string).then(({ result }) => {
    subList.value = result.children
  })
}
watch(() => route.params.id, (newVal) => {
  if(newVal && route.path === `/category/${newVal}`) getSubList()
}, { immediate: true })
</script>
<style scoped lang="less">
.top-category {
  h3 {
    font-size: 28px;
    color: #666;
    font-weight: normal;
    text-align: center;
    line-height: 100px;
  }

  .sub-list {
    margin-top: 20px;
    background-color: #fff;

    ul {
      display: flex;
      padding: 0 32px;
      flex-wrap: wrap;

      li {
        width: 168px;
        height: 160px;

        a {
          text-align: center;
          display: block;
          font-size: 16px;

          img {
            width: 100px;
            height: 100px;
          }

          p {
            line-height: 40px;
          }

          &:hover {
            color: @xtxColor;
          }
        }
      }
    }
  }

  // 推荐商品
  .ref-goods {
    background-color: #fff;
    margin-top: 20px;
    position: relative;

    .head {
      .xtx-more {
        position: absolute;
        top: 20px;
        right: 20px;
      }

      .tag {
        text-align: center;
        color: #999;
        font-size: 20px;
        position: relative;
        top: -20px;
      }
    }

    .body {
      display: flex;
      justify-content: flex-start;
      flex-wrap: wrap;
      padding: 0 65px 30px;
    }
  }
}
</style>